helpers/Convert-SPClientIncludeExpression.ps1

# Convert-SPClientIncludeExpression.ps1## Copyright (c) 2017 karamem0# # Permission is hereby granted, free of charge, to any person obtaining a copy# of this software and associated documentation files (the "Software"), to deal# in the Software without restriction, including without limitation the rights# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell# copies of the Software, and to permit persons to whom the Software is# furnished to do so, subject to the following conditions:# # The above copyright notice and this permission notice shall be included in all# copies or substantial portions of the Software.# # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE# SOFTWARE.

process{if(-not$InputString.StartsWith('Include(')){throw"Cannot convert expression because 'InputString' parameter does not start with 'Include( '."}if(-not$InputString.EndsWith(')')){throw"Cannot convert expression because 'InputString' parameter does not end with ')'."}$InputString=$InputString.Substring(8,$InputString.Length-9)$itemType=$Expression.Type.BaseType.GenericTypeArguments[0]$funcType=[type]'System.Func`2'|ForEach-Object{$_.MakeGenericType($itemType,[object])}$exprType=[type]'System.Linq.Expressions.Expression`1'|ForEach-Object{$_.MakeGenericType($funcType)}$paramExpr=[System.Linq.Expressions.Expression]::Parameter($itemType,$itemType.Name)$lambdaExprArray=Split-SPClientExpressionString-InputString$InputString-Separator','|ForEach-Object{$propExpr=Convert-SPClientMemberAccessExpression-InputString$_-Expression$paramExpr$castExpr=[System.Linq.Expressions.Expression]::Convert($propExpr,[object])$lambdaExpr=[System.Linq.Expressions.Expression]::Lambda($funcType,$castExpr,$paramExpr)Write-Output$lambdaExpr}$arrayExpr=[System.Linq.Expressions.Expression]::NewArrayInit($exprType,[System.Linq.Expressions.Expression[]]$lambdaExprArray)$includeExpr=[System.Linq.Expressions.Expression]::Call(`[Microsoft.SharePoint.Client.ClientObjectQueryableExtension].GetMethod('Include').MakeGenericMethod($itemType),`[System.Linq.Expressions.Expression[]]@($Expression,$arrayExpr))Write-Output$includeExpr}